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| Miguel... |
 Posted: Wed Oct 28, 2009 5:22 am |
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Guest
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Hello,
I have a problem about how to test a hypothesis.
I am working in an analytical method that would provide a parameter related to a material.
The results obtained are like this (I have 15 samples actually)
Sample Method 1 Method 2
A 5 4
B 10 11
C 16 15
D 22 24
I would like to prove that both methods lead to the same results but I do not know how. Up to now I have always made ANOVA tests and similar in order to prove a difference (i.e. rejecting the null hypothesis of both methods are equal) but now I would like to do exactly the contrary (i.e. reject the null hypothesis of both methods are different). I do not know how I should proceed.
Any idea?
Thank you in advance
Miguel |
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| Bruce Weaver... |
| Posted: Wed Oct 28, 2009 12:11 pm |
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Guest
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On Oct 28, 11:22 am, Miguel <miguel... at (no spam) hotmail.com> wrote:
[quote]Hello,
I have a problem about how to test a hypothesis.
I am working in an analytical method that would provide a parameter related to a material.
The results obtained are like this (I have 15 samples actually)
Sample Method 1 Method 2
A 5 4
B 10 11
C 16 15
D 22 24
I would like to prove that both methods lead to the same results but I do not know how. Up to now I have always made ANOVA tests and similar in order to prove a difference (i.e. rejecting the null hypothesis of both methods are equal) but now I would like to do exactly the contrary (i.e. reject the null hypothesis of both methods are different). I do not know how I should proceed.
Any idea?
Thank you in advance
Miguel
[/quote]
You want a test of equivalence. Here is one resource to get you
started:
http://www.graphpad.com/library/BiostatsSpecial/article_182.htm
--
Bruce Weaver
bweaver at (no spam) lakeheadu.ca
http://sites.google.com/a/lakeheadu.ca/bweaver/Home
"When all else fails, RTFM." |
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